Bryan and Adam have $80.
Bryan has 7 times as much money as Adam.
How much must Bryan give to Adam
so Bryan will have $60 less than Adam?
|
Bryan |
Adam |
Total |
Before |
7 u |
1 u |
8 u |
Change |
- ? |
+ ? |
No change |
After |
$10 |
$10 + $60 |
$80 |
At first
Bryan = 7 u
Adam = 1 u
Total = 1 u + 7 u = 8 u
8 u = 80
1 u = 80 ÷ 8 = 10
Amount that Bryan has at first
= 7 u
= 7 x 10
= $70
For Bryan to have $60 less than Adam in the end, we need to set aside $60 for Adam before the remaining amount is divided into 2.
Amount that Bryan will have in the end
= (80 - 60) ÷ 2
= 20 ÷ 2
= $10
Amount that Bryan gives to Adam
= Amount that Bryan at first - Amount that Bryan has in the end
= 70 - 10
= $60
Answer(s): $60